Please, its for a test! Is the relation of a function {(-4, 7), (-3, 5), (1, 4), (3, -8), (5, -11)]

Solve for x and y: 217x + 131y = 913; 131x + 217y = 827

Heather is riding a quadratic function that represents a parabola that touches but does not cross the x-axis at x=-6

Answer 20 points and brainiest ! on the board, your teacher writes an example of how to find the median. one of the numbers is erased, leaving what is shown, 18, 30, 26,12 22. what is the median? a. 10 b. 20 c. 24 d. 28